摘要
在变电站接地网状态检测的工程实际中,在无接地网图纸的情况下,为了获知地下网格导体的位置以及网格结构,采用先通过上引导体线向接地网注入一定频率的正弦波电流,然后测量地表面磁感应强度的分布,依据分布特征和规律进行探测的方法。仿真计算表明方法可行,设计开发了变电站接地网导体及网格结构探测的特种异频电流源系统、移动式微弱磁感应强度测量系统和相应的软件系统。实验和应用证实了该方法的准确性和系统的可靠性,该系统可用于工程实际。
In order to obtain the mesh conductor place and mesh structure of grounding grid without drawings,a detecting method is developed.A sinusoidal wave current of specified frequency is injected directly into grounding grid by two ground lead wires.At the same time,the distribution characteristics of the surface magnetic induction intensities are measured,and then the conductor places and mesh structure could be detected by the distribution laws.The simulation calculation is shown that the method is feasible.A special current power and moving system for measuring faint magnetic induction intensities and fitting software system are designed.Experements and applications prove that the method is accurate and the system is reliability.It can be used in the engineering practice.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第5期167-173,共7页
Transactions of China Electrotechnical Society
关键词
变电站
接地网
网格导体
网格结构
探测系统
Substation
grounding grid
mesh conductor
mesh structure
detecting system
